From: "Anders Sandberg" <asa@nada.kth.se>
> To my knowledge the studies that have been done have not shown any
> correlation of happiness with wealth

Winning just £1,000 can be enough to change a person's outlook on life,
suggests the study by researchers at the University of Warwick.
However, less than £1m is unlikely to have a lasting effect on a person's
happiness and experts found a strong marriage and good health were more likely
to make people feel content than money.
Full text
http://news.bbc.co.uk/hi/english/health/newsid_1750000/1750337.stm